With still nearly a month before its premiere, Captain America: The First Avenger is already experiencing some pretty positive pre-release buzz – thanks to an excellent final trailer and favorable early reviews.

Recently, Chris Evans talked about Cap’s role in Joss Whedon’s The Avengers and how the character will differ from the one in next month’s Captain America. Speaking of Captain America: The First Avenger, we’ve also added a comprehensive commentary of CA’s last trailer with the film’s writers.

When asked by SFX Magazine about whether or not Steve Rogers was too perfect, Chris Evans had this to say:

“That’s the issue. When I first read the script I thought, ‘There’s a risk of this being bland. I don’t know what his internal struggle is. He starts out a great guy, he ends a great guy. Where’s the conflict?’ Everyone asks the question, ‘If someone killed your brother, would you want to murder that person or would you take them to jail?’ There does come a time when Cap has to remember he’s been given this power and not turn into an evil person.”

On how Cap’s role will play out in The Avengers, Evans said:

“That’s where he is gonna get some conflict. It’s gonna be about not just adjusting to the fact that every human being he knows is dead, but adjusting to the evolution in society, and how modern values and morals have changed. But Cap’s not a complainer. He doesn’t whine. So it’s gonna be a matter of finding conflict but without moaning. They do deal with that in The Avengers script.”

Finally, check out the video commentary of the final trailer (with Captain America writers Chris Markus and Stephen McFeely):

In the video, the writers discuss practically every fleeting moment in the trailer, from the appearance of all-important Cosmic Cube (that glowing Rubik’s Cube from the Thor after-credits sequence) to the Howling Commandos (sans Nick Fury), Captain America’s “Q,” otherwise known as Howard Stark (Tony Stark’s father), to Cap wielding a pistol, a badge-like shield (as he did in his first appearance), and driving a motorcycle (a la the terrible TV show from 1979).

It’s a very comprehensive and interesting video, so even if you have watched the trailer several hundred times over, it’s worth watching again for the commentary. That said, the explanation for why the filmmakers used the “Hydra” as villains instead of plain old Nazis sounds more like a PR spin. It’s easy to presume that a statement like “Swastikas don’t sell toys” was more problematic than “We didn’t want to insult World War II veterans by having Captain America fight Nazis.”

Captain America hits theaters July 22nd, 2011. The Avengers is currently filming and hits theaters May 4th, 2012.